FEAT #21724 TIME 0:10 accept delay -1, can disable DLT in admin

src/app/resource/controllers/IndexingController.php

...nistration/doctype/doctypes-administration.component.html

...ministration/doctype/doctypes-administration.component.ts

...d/app/indexation/indexing-form/indexing-form.component.ts

src/lang/lang-en.json

src/lang/lang-fr.json